Search found 2989 matches

by Mike
Sat Feb 24, 2018 7:19 am
Forum: Games
Topic: TNT's Z-code interpreter, and FE3
Replies: 80
Views: 20320

Re: TNT's Z-code interpreter, and FE3

I have 2 penultimate cartridges too. [...] the newer one that is menu driven I am not too sure. it says "enable all memory 32kb" I checked against their website at: https://www.thefuturewas8bit.com/index.php/penultimatecart The v5.0a revision presents a menu for Memory options, which clea...
by Mike
Sat Feb 24, 2018 4:19 am
Forum: Hardware and Tech
Topic: High density
Replies: 5
Views: 80

Re: High density

Other than a DD drive cannot reliably write on HD disks due to the reasons already laid out in the thread, I'd be very surprised to see a permanent damage done to DD drive (heads) from HD disks. What I've seen in those times though - and this strictly refers to 3 1/2" DD drives and HD disks: I ...
by Mike
Sat Feb 24, 2018 3:52 am
Forum: Games
Topic: TNT's Z-code interpreter, and FE3
Replies: 80
Views: 20320

Re: TNT's Z-code interpreter, and FE3

You need a VIC (or an emulator setting) with 40K ! 32K is not enough, there must also be RAM in the block 5 ($A000-$BFFF). "+32K" is commonly referred to as the RAM configuration with RAM in BLK1..3 and BLK5. If you also use the 3K in the address range $0400..$0FFF (like Kweepa did with V...
by Mike
Fri Feb 23, 2018 2:44 am
Forum: Programming
Topic: Compression for Vic-20
Replies: 3
Views: 166

Re: Compression for Vic-20

It can be quite instructive to design and implement an own (de)compressor. :) For the second installation of the Bible Series I reused a streaming text compression scheme I once devised on the Acorn Archimedes, and where I took the idea from an article in Dr. Dobb's around 1994: it compresses three ...
by Mike
Thu Feb 22, 2018 6:54 am
Forum: Other Systems
Topic: Stroboscopes: why smartphone LED can't blink fast?
Replies: 11
Views: 123

Re: Stroboscopes: why smartphone LED can't blink fast?

[...] the OS runs on a hex-core 64bit CPU at 2 GHz [...] The CPU could even run at infinite speed: when a resource is locked it can't do anything about this. And then it waits... and waits... and waits... until the resource is available, and then the locked thread/process can continue. That's a pro...
by Mike
Thu Feb 22, 2018 5:15 am
Forum: Other Systems
Topic: Stroboscopes: why smartphone LED can't blink fast?
Replies: 11
Views: 123

Re: Stroboscopes: why smartphone LED can't blink fast?

Mike, of course when the LED is used as a stroboscope it's not driven at high power as when used as a flash unit. "Of course"? Can you really be sure that the app isn't misusing the presumably faster response of the LED when it is triggered as flash? [...] the smartphone also has a factor...
by Mike
Wed Feb 21, 2018 5:55 pm
Forum: Games
Topic: TNT's Z-code interpreter, and FE3
Replies: 80
Views: 20320

Re: TNT's Z-code interpreter, and FE3

Hi, Bit Shifter! It's nice to see your Z-code interpreter is going to have an 'official' release at last. :D It's really a screenshot from VICE emulating the VIC-20, not a fake or C64 shot. Bitmap-hosted font engines (monospaced or proportional) have been used in several releases here on Denial, so ...
by Mike
Wed Feb 21, 2018 5:43 pm
Forum: Other Systems
Topic: Stroboscopes: why smartphone LED can't blink fast?
Replies: 11
Views: 123

Re: Stroboscopes: why smartphone LED can't blink fast?

highinfidelity, LEDs used for lighting purposes are not anymore those "cold solid state components" you think of - rather, cooling efforts are necessary to dissipate excess heat: their efficiency is still less than 100%, and we're dealing with >1 W of electrical power already. Furthermore,...
by Mike
Wed Feb 21, 2018 1:42 am
Forum: Programming
Topic: BASIC compilers
Replies: 8
Views: 255

Re: Vic Compiler Program

I took a quick peek. It's most probably the same breed of Tiny BASIC compiler that has been discussed in the thread ' Should these tapes be archived? ', and to quote from there: Apparently, this only compiles mathematical programs, like the sample provided within the program. It won't compile full b...
by Mike
Sun Feb 18, 2018 3:12 pm
Forum: Hardware and Tech
Topic: reset button
Replies: 8
Views: 164

Re: reset button

i have done this mods when i was young on my Vic 20 and my CBM 8032, but as i know how to solder.... i'll solder a reset button following the pictures. O.K. :) I mean VDD not VCC , RESET is active when low.... i remember From your first post, mentioning pins #1 and #40 of the 6502, you would have c...
by Mike
Sun Feb 18, 2018 12:20 pm
Forum: Hardware and Tech
Topic: reset button
Replies: 8
Views: 164

Re: reset button

Just for you to know: /RESET is low-active, i.e. the reset pin needs to be set to low level, not high level (Vcc) to make a reset. As a rule of thumb: if you need to ask someone else where to solder inside a computer, because you cannot infer this for yourself from schematics and data sheets, in sho...
by Mike
Sun Feb 18, 2018 5:33 am
Forum: Hardware and Tech
Topic: reset button
Replies: 8
Views: 164

Re: reset button

No. You are supposed to first identify the type of your mainboard (VIC-20 or VIC-20CR), and then apply the solder job corresponding to your type of the mainboard.

If you're unsure how to proceed, you're better off with a user-port reset switch.
by Mike
Sat Feb 17, 2018 5:02 pm
Forum: Programming
Topic: Fun with CBM arithmetics
Replies: 26
Views: 4986

Re: Fun with CBM arithmetics

Regards your question of a feasible file format: you'd most probably be content with a *.prg file that executes the patch by copying the original ROM contents, doing a check whether it works on the original byte values it aims to replace, and putting the replacement bytes there. Much similar to how ...
by Mike
Tue Feb 13, 2018 9:36 am
Forum: Hardware and Tech
Topic: Which memory expansions with more than +37K are you using?
Replies: 11
Views: 203

Re: Which memory expansions with more than +37K are you using?

Be ready to have nuclear fusion explained in detail by Mike :mrgreen: Awww! Don't spoil the fun for me! ;) In any case, I pointed pixel to the home page of my employer already some time ago. :) As long as I can make him hate me, too. ;) Unlikely. Someone needs to be obliged as aide for developing p...
by Mike
Tue Feb 13, 2018 8:01 am
Forum: Hardware and Tech
Topic: Which memory expansions with more than +37K are you using?
Replies: 11
Views: 203

Re: Which memory expansions with more than +37K are you using?

das Kamener Kreuz am Bande Muaharhar! Den kannte ich noch nicht. :lol: so that's why my MegaCart settings keep getting corrupted :x Should be easy to find out the culprit. For now, there are not too many candidates out there. While we're at this ... http://sleepingelephant.com/ipw-web/bulletin/bb/v...

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